VA-MYCORRHIZAL SURVEY OF PLANT SPECIES COLONIZING BEACH PONDS OF KARWAR IN SOUTH INDIAH.C. LAKSHMAN
Survey of beach_ ponds community in south India-Karwar, was found to have vesicular arbuscular mycorrhizae. Mycorrhizal colonization of individual species was found to be related to the environmental conditions prevailing at the time of their rooting. Altogether thirty eight plant species were screened. Thirty three plants had vesicular arbuscular colonization over the length of the roots. Among Dicot plants: Zornia gibbosa, Acanthus illicifolius, Imponwea biloda, Tridax procuinbens and Justicea simplex had 59.1 ± 5.1 to 83.3 ± 5.1 % and among monocot plants; Andropogon triceus, spin ifex sequarrosus, Diplachne fusa, Digitaria latifalia, cynodos dactylan, Arstida redacta 62.4 ± 4.7 to 97.3 ± 5.1% had significantly higher hyphal colonization which ramified the root cortex. And eight species; Capparis divercata (Capparidaceae) carex speciosa, cyperus pan iceus (cyperaceae) Eriocaulan sieboldianum (Eniocaulaceae) portulaca oleraceae (Protulaceaea) polygonum plebejuni (polygonaceae) Typha angustata (Typhaceae) Tribulus teriestris (Zygophyllaceae) were non-mycorrhizal or had little colonization. The spore number did not correlate with mycorrhizal colonization though mycorrhizal plants were prevalent. Rhizosphere soil samples of fifteen plants showed the presence of common fungal spores: Glomus citricolum, G. fasciculatum, G. mosseae, G. boreale, Acaulospora longula and Scutellospora pellucida.
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